Electric Traction For three-phase induction motors which of the following is the least efficient method of speed control? Combination of cascade and pole changing Cascade control Pole changing Rheostat control Combination of cascade and pole changing Cascade control Pole changing Rheostat control ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Which of the following is the advantage of electric braking? It is instantaneous It avoids wear of track Motor continues to remain loaded during braking More heat is generated during braking It is instantaneous It avoids wear of track Motor continues to remain loaded during braking More heat is generated during braking ANSWER DOWNLOAD EXAMIANS APP
Electric Traction If the coefficient of adhesion on dry rails is 0.26, which of the following could be the value for wet rails? 0.35 0.16 0.26 0.46 0.35 0.16 0.26 0.46 ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Watt-hours per tonne km is usually the specific energy consumption for suburban services. 100-150 150-200 50 - 75 120-150 100-150 150-200 50 - 75 120-150 ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Coefficient of adhesion reduces due to the presence of which of the following? Both Dew on rails and Oil on the rails Oil on the rails Sand on rails Dew on rails Both Dew on rails and Oil on the rails Oil on the rails Sand on rails Dew on rails ANSWER DOWNLOAD EXAMIANS APP
Electric Traction Specific energy consumption is least in _______ service. Suburban Main line None of the listed here Urban Suburban Main line None of the listed here Urban ANSWER DOWNLOAD EXAMIANS APP
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